This is the 11933rd most frequent Russian word.
застрелены
"Shot" (killed or injured by a gun).
The verb 'застрелены' indicates the passive voice, showing that the soldiers were the recipients of the action, in this case being shot.
Два солдата были застрелены в ходе перестрелки.
Two soldiers were shot during the shootout.
Here, 'застреленные' is used as an adjective derived from the verb, describing the state of the crows.
Застреленные вороны лежали на земле.
Shot crows were lying on the ground.
Again, 'застрелен' in its passive voice form illustrates that the criminal was subjected to the action of being shot.